I had a “déjà vu” feeling with this picture; indeed it’s very similar to this one published in February. Here again, the chevrons of this US Army corporal can be barely seen on the sleeve of the M1917 overcoat. This NCO wears a M1912 officer/NCO pistol belt, with ammunition pouches for his M1917 .45 revolver (a Colt or a Smith & Wesson).
He has a muddy walking stick too. Was it a studio prop?